Can and should I sue my doctor for neglect?

I was diagnosed with bladder cancer in Feb, of this year. I was admitted through the ER . This is hard to explain so please if I get confusing ask me to be clear.

I had no health insurance first off, I was in the hospital for 6 days and had a TURBST done while there along with several CT's and blood tests. The doctors I received while in the hospital where my urologist who did my TURBST surgery and an oncologist from USA mitchell cancer center. On the first visit by the doctors while in the hospital they explained I had a very aggressive high grade muscle invasive tumor and in The TURBST surgery they had to remove what they could of the tumor and removed part of my prostate. The doctors explained that I needed aggressive treatment , They out lined it as Surgery to remove the bladder and prostate and then chemo theropy and possible radiation theropy. They made sure that was the order. I was then released from the hospital and had appointments set up with both doctors for follow up. The appointment with the urologist was first, He explained how serious my condition was but also explained to me and mt wife that because I had no insurance I would not receive the kind of care that I needed. That was hard to hear. Then the appointment with the oncologist, He explained that the surgery was the only first step to take, He called The urologist while I was there because he wanted him to set up an appointment at UAB for surgery and he was the one to call since he could have some pull since he is a member of their board at UAB, He agreed to call and get it set up, First of all that never happened, Instead the oncologist suggested we try to start chemo to reduce the tumor if possible before surgery. We did 3 rounds of chemo. In that time I had gotten approved for medicaid and asked about the surgery since insurance was the thing holding me up. He ignored my questions. He added more chemo. By the time I finished 5 rounds of chemo my medicaid had run out. Ok so now with a bit of the back story in, After 5 rounds of chemo my oncologist advised me that the tumor had reduced in size and he really wanted to get me in to surgery quickly because he was unsure how long the tumor would be reduced. He called the urologist once again. The urologist did call UAB and had some good news this time, They would send me some paperwork to fill out for a program that provides insurance through UAB for people such as myself. Ok so anyway, My oncologist said no more chemo for now because he was hoping for surgery quickly, he also advised me that he could no longer be my doctor because he was leaving to except a better position in Washington. Ok so I have been dumped by my oncologist and the urologist up until now has not really done anything, on appointments he would rush in and out and not really do much. Now here is my question about a lawsuit, I sent the paperwork in to UAB and am waiting for an appointment to get started on my surgery. I was approved within 10 minutes for their program for low income and uninsured patients. They also told me the urologist new of this program and they did not understand why he did not advise me in the beginning . Now I am in a position where he new and did not tell me and now the tumor is growing from being off the chemo. This has put me in serious danger and has maybe cost me a chance at beating the cancer. It instead has had time to progress and spread. My question is since he knew about the program and still chose not tp advise me of it and may have cost me the only shot I had at real recovery if I could and should I contact a lawyer to sue for neglect. He could have advised me and had the surgery done first like he advised I should but chose not to for some reason. I just don't know what to do, I feel terrible because he chose to tell us I may die because I had no insurance when he could have instead helped me with the phone call to UAB 7 month and 5 rounds of chemo ago. I know the tumor is back because I am back to bleeding. My oncologist is gone now and I have to wait to go to UAB for my first appointment. The point is the doctor made everything worse by not telling me what he knew about UAB in the beginning and may have cost me the only chance I had at survival . UAB has advised me that they will have to start from scratch because neither of my doctors had even run any of the tests they could have to help me, chemo was the wrong start but they did it because I had no insurance instead of getting me in the program that would have helped faster. I know , it's confusing but please try to understand what I wrote because I feel like the doctor new about this program and just decided to let me die over insurance. He just didn't bother to make the phone call on day 1.